Results 141 to 150 of about 216,508 (311)

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Bifunctional Photocatalysts: Exploiting Proximity for Enhanced Reaction Performance

Chemistry – A European Journal, EarlyView.
This review covers the application of the bifunctional approach to photocatalysis as a means to attain (enhanced) enantioselectivity, and, more in general, as a strategy to enhance the catalytic performance through an effective use of short‐lived reaction intermediates.
Luigi Dolcini, Daniele Lavelli, Alberto Dal Corso, Luca Pignataro   +3 more
wiley   +1 more source

Features of reproduction and assisted reproduction in the white (Ceratotherium simum) and black (Diceros bicornis) rhinoceros [PDF]

, 2015
Despite the worldwide increase of rhinoceros calf numbers, the growth of the population of white and black rhinoceros is slowing down mainly due to anthropogenic causes, such as poaching and habitat loss.
Govaere, Jan, Van Soom, Ann, van Zijl Langhout, M, Ververs, Cyrillus   +3 more
core  

PEK14: A Kinesin‐4 Necessary for Male‐Derived Fertility in Arabidopsis thaliana

Cytoskeleton, EarlyView.
ABSTRACT Of the 61 kinesins annotated in Arabidopsis thaliana, many are still without assigned function. Here, we have screened an insertional mutant library of Arabidopsis pollen‐expressed kinesins for fertility defects. Insertional mutants for three kinesins showed a significant reduction in seed set.
Isabella N. Mendes, Norman R. Groves, Jessica Z. Li, Lily N. Thompson, Brian J. Smith, Aman Y. Husbands, Iris Meier   +6 more
wiley   +1 more source

Effect of Vitamin C, Alpha Lipoic Acid (ALA), and Pentoxifylline on the Sperm Parameters, Cryosurvival Rate, and MDA Concentration after Thawing in Cryopreservation

International Journal of Technology
Cryopreservation provides available sperm for subsequent use in Assisted Reproductive Technology (ART), but it still has detrimental effects on sperm quality.
Luthfiana Hardianingtyas, Silvia W Lestari, Gita Pratama, Kusmardi Kusmardi   +3 more
doaj   +1 more source

Exposing dairy bulls to high temperature-humidity index during spermatogenesis compromises subsequent embryo development in vitro [PDF]

, 2020
Broekhuijse, Marleen L.W.J., de Cássia Bicudo, Luana, de Souza Ramos Angrimani, Daniel, Demeyere, Kristel, Llamas Luceno, Núria, Meyer, Evelyne, Mullaart, Erik, Peelman, Luc, Szymańska-Vandendriessche, Katarzyna, Van Poucke, Mario, Van Soom, Ann   +10 more
core   +2 more sources

Nuclear Entanglement: New Insights Into the Role of Cytoskeleton and Nucleoskeleton in Plant Nuclear Function

Cytoskeleton, EarlyView.
ABSTRACT Of the three types of cytoskeleton known in animals—actin, microtubules, and intermediate filaments—only actin and microtubules exist in plants. Both play important roles in cellular shaping, organelle movement, organization of the endomembrane system, and cell signaling.
Norman R. Groves, Katelyn Amstutz, Lily A. Schumacher, Iris Meier   +3 more
wiley   +1 more source

Oxidative Stress, DNA Fragmentation and Caspase-3 Regulation in HIV-1 Positive Men: A Study of Sperm Preparation

International Journal of Technology
The impact of human immunodeficiency virus (HIV) infection on male fertility, specifically sperm quality, remains inconclusive in global studies. However, stable HIV-positive men undergoing antiretroviral therapy (ARV) experience improved quality of life
Margaretha Napitupulu, Friska Zai, Silvia W Lestari, Latisha Witjaksono, Zulfikar Drakel, Dhriti Bhavnani, Evy Yunihastuti, Gita Pratama, Ria Kodariah, Kusmardi Kusmardi   +9 more
doaj   +1 more source

Comparison of five different methods to assess the concentration of boar semen [PDF]

, 2010
Both for research and practical purposes, accurate and repeatable methods are required to assess the concentration of boar semen samples. Since the method which is used may influence the results considerably, the aim of the present study was to compare 5
Deley, W, Maes, Dominiek, Rijsselaere, Tom, Sokolowska, A, Van Soom, Ann, Vyt, P   +5 more
core  

In Vitro Live Cell Imaging Reveals Nuclear Dynamics and Role of the Cytoskeleton During Asymmetric Division of Pollen Mitosis I in Nicotiana Benthamiana

Cytoskeleton, EarlyView.
ABSTRACT Pollen is a male gametophyte of angiosperms. Following meiosis, the microspore undergoes an asymmetric division called pollen mitosis I (PMI), which produces two cells of different sizes: a large vegetative cell and a small generative cell. Polarized nuclear migration and positioning during PMI are important for successful pollen development ...
Yoko Mizuta, Masako Igarashi, Tomomi Shinagawa, Ikuma Kaneshiro, Haoto Anan, Daisuke Kurihara   +5 more
wiley   +1 more source